Wirtgen slipform paver SP 850: A multi-purpose machine
The slipform paver SP 850 from Wirtgen was deemed to be the right machine for the job, being extremely versatile: This machine can pave roadways between 2.50 m and 10.0 m wide and up to 450 mm thick. In addition, it can be equipped with a dowel bar inserter, as well as with a middle bar and tie bar inserter. Last but not least, it owes its outstanding maneuverability and good traction to four separately driven and steered crawler tracks. In short, it is an ideal machine for small, medium and large roads, as well as for other infrastructure projects.
Operator training before starting
The DST-5 team was thoroughly trained by Wirtgen instructors before the paving work started. Vyacheslav Bruyok of PC Fomar Ltd., the Wirtgen Group's dealer in Belarus, explains why this was needed: "Due to the large number of suitable quarries, concrete is widely used as a construction material in Belarus. However, such a large concrete paver as the SP 850 has never before been used here."
Paving of the first section between Ostroschizki Gorodok and Aksakowschtschina started in mid-June 2015. With a total thickness of 24 cm, the roadway comprises 18 cm of bottom-layer concrete with dowel bars and 6 cm of top-layer concrete. The bottom-layer concrete contained 320 g cement per kg, while the more heavily stressed top-layer concrete was produced in the form of washed concrete containing 420 g cement per kg. As considerably less concrete is needed for dual-layer paving, costs can be cut significantly.